Mailsink MCP Server

by heocoiio.github.heocoi/mailsinkv0.1.5

Disposable inboxes for AI agents and CI: catch the verification email, read the OTP or link.

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Maintained50d ago

Install Mailsink MCP server

claude mcp add mailsink -e MAILSINK_API_KEY='<mailsink-api-key>' -- npx -y @mailsink/mcp

{
  "mcpServers": {
    "mailsink": {
      "command": "npx",
      "args": [
        "-y",
        "@mailsink/mcp"
      ],
      "env": {
        "MAILSINK_API_KEY": "<mailsink-api-key>"
      }
    }
  }
}

Add to ~/.cursor/mcp.json (global) or .cursor/mcp.json (project).

{
  "mcpServers": {
    "mailsink": {
      "command": "npx",
      "args": [
        "-y",
        "@mailsink/mcp"
      ],
      "env": {
        "MAILSINK_API_KEY": "<mailsink-api-key>"
      }
    }
  }
}

Settings → Developer → Edit Config (claude_desktop_config.json), then restart.

{
  "servers": {
    "mailsink": {
      "type": "stdio",
      "command": "npx",
      "args": [
        "-y",
        "@mailsink/mcp"
      ],
      "env": {
        "MAILSINK_API_KEY": "<mailsink-api-key>"
      }
    }
  }
}

Add to .vscode/mcp.json in your workspace.

{
  "mcpServers": {
    "mailsink": {
      "command": "npx",
      "args": [
        "-y",
        "@mailsink/mcp"
      ],
      "env": {
        "MAILSINK_API_KEY": "<mailsink-api-key>"
      }
    }
  }
}

Add to ~/.codeium/windsurf/mcp_config.json.

Configuration

Variable	Required	Secret	Description
MAILSINK_API_KEY	yes	yes	Your MailSink API key. Get it at https://mailsink.dev/auth/github
MAILSINK_API_URL	—	—	Optional API base URL override (defaults to https://api.mailsink.dev)

Freshness

Maintained — last maintenance signal 50d ago. The newest of the signals below sets the band.

Last commit (default branch)
2026-08-21 · 50d ago · GitHub
Latest release
no data · GitHub
Package published
no data · npm/PyPI
Registry entry updated
2026-08-21 · 50d ago · official registry · v0.1.5

FAQ

›How do I install the Mailsink MCP server in Claude Code?

Run: claude mcp add mailsink -e MAILSINK_API_KEY='<mailsink-api-key>' -- npx -y @mailsink/mcp. For Cursor, VS Code, Claude Desktop and Windsurf, use the install tabs above.

›Does Mailsink require an API key?

Yes. It expects MAILSINK_API_KEY, of which 1 is a secret.

›Can I use Mailsink as a remote (hosted) MCP server?

No hosted endpoint is published; it runs locally over stdio.

›Is Mailsink in the official MCP registry?

Yes, as io.github.heocoi/mailsink.